Burner for stirling engines

Abstract

A burner for a Stirling engine includes a combustion chamber forming an air-fuel mixture by mixing air and fuel supplied from air inlet passageways and a fuel injection nozzle, an igniter igniting the air-fuel mixture within the combustion chamber, a heater tube absorbing high-temperature heat generated by the combustion of the air-fuel mixture and transferring it to the Stirling engine, and exhaust gas passageways discharging an exhaust gas to the outside. In addition, a heating duct is provided between the combustion chamber and a head portion of the Stirling engine. The heating duct transfers high-temperature combustion gas through combustion gas passageways to the heater tube, thereby increasing a heat transfer rate and preventing corrosion.

What is claimed is: 
     
       1. A burner for a Stirling engine, comprising: a combustion chamber for forming an air-fuel mixture by mixing air and fuel supplied from a plurality of air inlet passageways and a fuel injection nozzle;   an igniter for igniting said air-fuel mixture within said combustion chamber;   a heater tube having an overall length extending in a direction toward said combustion chamber for absorbing high-temperature heat generated by combustion of said air-fuel mixture;   a plurality of exhaust gas passageways for discharging an exhaust gas to the outside; and   a heating duct extending from said combustion chamber along substantially the overall length of said heater tube, said heating duct having a plurality of combustion gas passageways therein for allowing high temperature combustion gas to pass therethrough to said heater tube.   
     
     
       2. The burner according to claim 1, wherein said heating duct further includes an insulating plate provided therein at a lower portion thereof. 
     
     
       3. The burner according to claim 1, wherein said combustion gas passageways are spaces formed by cutting away a lower end portion of said heating duct at prescribed intervals. 
     
     
       4. The burner according to claim 1, wherein said combustion gas passageways are a plurality of pores perforated at a lower circumferential portion of said heating duct. 
     
     
       5. The burner according to claim 1, wherein said heating duct is a porous foam. 
     
     
       6. The burner according to claim 5, wherein said porous foam is made of a ceramic.